Drill floor hole

Abstract

A drill floor hole comprising a through-going vertical opening in a drill floor. A pipe holder is mounted so as to be capable of vertical movement below the opening. The pipe holder is suspended in a pulley loop in a wire drive wherein a wire is attached to the drill floor, runs down and over the pulley loop and passes up to a winch.

What is claimed is:  
     
       1. A drill floor hole, comprising an opening in a drill floor, a sleeve designed for the stabilising admission of a pipe joint through the opening, a pipe holder which is mounted so as to be capable of vertical movement relative to the sleeve, and a winch/wire/pulley assembly which includes a pulley loop on the pipe holder and a wire which runs down from a fixed point under the drill floor and passes over the pulley loop and runs up to a winch, which pipe holder is freely disposed below the drill floor without a surrounding sleeve. 
     
     
       2. A drill floor hole according to claim  1 , wherein the wire runs to the winch over a travelling block suspended under the drill floor. 
     
     
       3. A drill floor hole according to claim  1 , wherein the winch is located on a cellar deck below the drill floor. 
     
     
       4. A drill floor hole according to claim  1 , wherein the wire runs to the winch over a travelling block suspended in the sleeve member.